package com.my.coolweather;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.my.coolweather.db.City;
import com.my.coolweather.db.County;
import com.my.coolweather.db.Province;
import com.my.coolweather.gson.Weather;
import com.my.coolweather.util.HttpUtil;
import com.my.coolweather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * Created by Administrator on 2018/10/22.
 */

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE = 0;
    public static final int LEVEL_CITY = 1;
    public static final int LEVEL_COUNTY = 2;

    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listview;
    private ArrayAdapter<String> adapter;
    private List<String> datalist = new ArrayList<>();

    //  省列表
    private List<Province> provinceList;
    //  市列表
    private List<City> cityList;
    //  县列表
    private List<County> countyList;

    //  选中的省份
    private Province selectedProvince;
    //  选中的城市
    private City selectedCity;
    //  当前选中的级别
    private int currentLevel;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View view = inflater.inflate(R.layout.choose_area,container,false);
        titleText = (TextView) view.findViewById(R.id.title_text);
        backButton = (Button) view.findViewById(R.id.back_button);
        listview = (ListView) view.findViewById(R.id.list_view);
        adapter = new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,datalist);
        listview.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState){
        super.onActivityCreated(savedInstanceState);
        listview.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> parent,View view,int position,long id){
                if (currentLevel == LEVEL_PROVINCE){
                    selectedProvince = provinceList.get(position);
                    queryCities();
                }else if(currentLevel == LEVEL_CITY){
                    selectedCity = cityList.get(position);
                    queryCounties();
                }else if (currentLevel == LEVEL_COUNTY){
                    String weatherId = countyList.get(position).getWeatherId();
                    if (getActivity() instanceof MainActivity){
                        Intent intent = new Intent(getActivity(),WeatherActivity.class);
                        intent.putExtra("weather_id",weatherId);
                        startActivity(intent);
                        getActivity().finish();
                    }else if(getActivity() instanceof WeatherActivity){
                        WeatherActivity weatherActivity = (WeatherActivity) getActivity();
                        weatherActivity.drawerLayout.closeDrawers();
                        weatherActivity.swipeRefresh.setRefreshing(true);
                        weatherActivity.requestWeather(weatherId);
                    }
                    Intent intent = new Intent(getActivity(), WeatherActivity.class);
                    intent.putExtra("weather_id",weatherId);
                    startActivity(intent);
                    getActivity().finish();
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View V){
                if (currentLevel == LEVEL_COUNTY){
                    queryCities();
                }else if (currentLevel == LEVEL_CITY){
                    queryProvices();
                }
            }
        });
        queryProvices();
    }

    //  查询全国所有的省，优先在数据库中查询，如果没有在到网上查询
    private void queryProvices(){
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList = DataSupport.findAll(Province.class);
        if (provinceList.size()>0){
            datalist.clear();
            for (Province province:provinceList){
                datalist.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listview.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else{
            String address = "http://guolin.tech/api/china";
            queryFromServer(address,"province");
        }
    }

    //  查询选中省内所有的市，优先在数据库中查询，如果没有在到网上查询
    private void queryCities(){
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);

        cityList = DataSupport.where("proviceId  = ?",String.valueOf(selectedProvince.getId())).find(City.class);
        if (cityList.size() > 0){
            datalist.clear();
            for(City city:cityList){
                datalist.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listview.setSelection(0);
            currentLevel = LEVEL_CITY;
        }else{
            int provinceCode = selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/"+provinceCode;
            queryFromServer(address,"city");
        }
    }

    //  查询选中市内所有的县，优先在数据库中查询，如果没有在到网上查询
    private void queryCounties(){
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid=?",String.valueOf(selectedCity.getId())).find(County.class);
        if (countyList.size() > 0){
            datalist.clear();
            for(County county:countyList){
                datalist.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listview.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else{
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromServer(address,"county");
        }
    }

    //  根据传入类型，从服务器上查询省市区数据
    private void queryFromServer(String address,final String type){
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText = response.body().string();
                boolean result = false;
                if ("province".equals(type)){
                    result = Utility.handleProvinceResponse(responseText);
                }else if ("city".equals(type)){
                    result = Utility.handleCityResponse(responseText,selectedProvince.getId());
                }else if ("county".equals(type)){
                    result = Utility.handleCountyResponse(responseText,selectedCity.getId());
                }
                if (result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if ("province".equals(type)){
                                queryProvices();
                            }else if("city".equals(type)){
                                queryCities();
                            }else if ("county".equals(type)){
                                queryCounties();
                            }
                        }
                    });
                }
            }

            @Override
            public void onFailure(Call call, IOException e) {
                //  通过 runOnUiThread()方法返回主线程处理逻辑
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_LONG).show();
                    }
                });
            }

        });
    }

    //  显示进度对话框
    private void showProgressDialog(){
        if (progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载……");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    //  关闭对话框
    private void closeProgressDialog(){
        if (progressDialog != null){
            progressDialog.dismiss();
        }
    }
}

